For some information on traveling with a dog, check out crazyguyonabike.com and search (upper right) for "touring with dog" there are several sources there including this one:
https://www.crazyguyonabike.com/doc/...c_id=6195&v=10
There are many people who take off on a long tour without any experience but I suspect you will be better served to take several short trips first, even just a 2 day overnighter to get a feel for how your equipment measures up and how your dog will handle riding along with you.
On the ACA site check out their Touring 101 for a good starting point:
https://www.adventurecycling.org/blog/bike-touring-101/
mike